Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca2f13072191e15…

MALICIOUS

PDF

53.1 KB Created: 2020-10-29 21:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 09b1cd7c015458c56187286d7e2bdbe1 SHA-1: 5d26bd93236320939d825754534c4651fc1ac24f SHA-256: 1ca2f13072191e1513668612554424e14cf031c3e54d1bbfd16273dc434e6deb
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/123?keyword=business+in+action+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5f9ae880e813d.pdfIn PDF document text
    • https://tafuposavibado.weebly.com/uploads/1/3/4/0/134017079/1271584.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/sukigomir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f91d4009e9b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f8b43516b017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f97989331c3c.pdfIn PDF document text
    • https://wajifisawebe.weebly.com/uploads/1/3/4/4/134480175/54ad6564bb4a.pdfIn PDF document text
    • https://zelidewa.weebly.com/uploads/1/3/4/3/134371532/8905857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_5f95334dcafa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_5f879e86a4945.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009291.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009291.bin)
    • https://uploads.strikinglycdn.com/files/45852b1e-c7c3-451f-bdf6-2ceff633f8f6/fuwixumumex.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/64812870032.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00009291.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9291 5072 bytes
SHA-256: dd69fe332553de1acdfc1fd70a4a8df7052b7fa6ece1f9cdcbed8ad5ba3c6d13
font_01_sfnt_off0000a3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3EE 10488 bytes
SHA-256: 2d0c69d0cbc02f0da91a43e00c8b5bc1ae5fae8559da7654a47dcaec0c7a5f1d